Steps

Docker - Introdução a administração de containers

Step1 of 3

Step 1

The Master is the controlling unit for the cluster. The Master will manage scheduling of new containers and understand which node they run on.

The Master will communicate with the API and nodes to complete the required tasks. Launching the Master will launch more services it requires to run the cluster. The Controller Manager handles replication. The Scheduler Server handles tracking resource use. It ensure containers can run on it's assigned node without overloading capacity.

Debugging Scenarios

Help

Katacoda offerings an Interactive Learning Environment for Developers. This course uses a command line and a pre-configured sandboxed environment for you to use. Below are useful commands when working with the environment.

cd <directory>

Change directory

ls

List directory

echo 'contents' > <file>

Write contents to a file

cat <file>

Output contents of file

Vim

In the case of certain exercises you will be required to edit files or text. The best approach is with Vim. Vim has two different modes, one for entering commands (Command Mode) and the other for entering text (Insert Mode). You need to switch between these two modes based on what you want to do. The basic commands are: